RRM Neighbor Message/RRM Neighbor Message dBm threshold/Recommended TPC settings

tjreeddoc — Mon, 05 Jul 2021 07:42:11 GMT

From reading Cisco’s Radio Resource Management under Unified Wireless Networks (Document ID: 71113) and the following Post (https://supportforums.cisco.com/discussion/10747596/configure-rrm-wlcs-avoid-interferences), I have a few questions which I am trying to get some clarification.

Questions

What is the default dBM an AP needs to receive/ “hear” a Neighbor Message at? Towards the beginning of the document, it states “…WLCs will add neighbors to their lists given they are heard at greater than or equal to -80 dBm and will only then remove them once their signals dip below -85 dBm.” However, towards the middle of the document, it states “the RF Group Leader will apply the TPC algorithm on a per-band, per-AP basis to adjust AP power transmit levels downward such that the third loudest neighbor AP will then be heard at a signal level of -70dBm (default value or what the configured value is) or lower and the TCP hysteresis condition is satisfied.”

When a Neighboring AP is no longer “heard” at -85 dBm or better, is the RF coming from the AP considered interference, co-channel interference if the two APs are on the same channel, Foreign Interference, or noise? I think it is co-interference but I am not sure.

What are the recommended settings for the power? Is it best practice to go with the defaults (Max 30 dBm/Min -10 dBm)? Reading the following post from Araon (https://supportforums.cisco.com/discussion/10747596/configure-rrm-wlcs-avoid-interferences) he recommended -74dBm based upon the output from the show ap auto-rf 802.11b <Cisco AP Name>. I am open to suggestions. (Please note: I do see this AP does not “hear” three other APs at -85 dBm or better. I understand this does affect RRM.)

Thank you,

T.J.

Following is the output from the show auto-rf 802.11command:

(DOCSADCWLC01) >show ap auto-rf 802.11b DOC-HQ-AP16.3

Number Of Slots.................................. 2

AP Name.......................................... DOC-HQ-AP16.3

MAC Address...................................... 4c:4e:35:60:45:96

Slot ID........................................ 0

Radio Type..................................... RADIO_TYPE_80211b/g

Sub-band Type.................................. All

Noise Information

Noise Profile................................ PASSED

Channel 1.................................... -88 dBm

Channel 2.................................... -94 dBm

Channel 3.................................... -95 dBm

Channel 4.................................... -95 dBm

Channel 5.................................... -94 dBm

Channel 6.................................... -85 dBm

Channel 7.................................... -94 dBm

Channel 8.................................... -93 dBm

Channel 9.................................... -78 dBm

Channel 10................................... -92 dBm

Channel 11................................... -93 dBm

Interference Information

Interference Profile......................... FAILED

Channel 1.................................... -128 dBm @ 0 % busy

Channel 2.................................... -128 dBm @ 0 % busy

Channel 3.................................... -128 dBm @ 0 % busy

Channel 4.................................... -128 dBm @ 0 % busy

Channel 5.................................... -128 dBm @ 0 % busy

Channel 6.................................... -85 dBm @ 22 % busy

Channel 7.................................... -128 dBm @ 0 % busy

Channel 8.................................... -128 dBm @ 0 % busy

Channel 9.................................... -128 dBm @ 0 % busy

Channel 10................................... -60 dBm @ 1 % busy

Channel 11................................... -82 dBm @ 1 % busy

Load Information

Load Profile................................. PASSED

Receive Utilization.......................... 0 %

Transmit Utilization......................... 0 %

Channel Utilization.......................... 69 %

Attached Clients............................. 5 clients

Coverage Information

Coverage Profile............................. PASSED

Failed Clients............................... 0 clients

Client Signal Strengths

RSSI -100 dbm................................ 0 clients

RSSI -92 dbm................................ 0 clients

RSSI -84 dbm................................ 0 clients

RSSI -76 dbm................................ 1 clients

RSSI -68 dbm................................ 1 clients

RSSI -60 dbm................................ 1 clients

RSSI -52 dbm................................ 2 clients

Client Signal To Noise Ratios

SNR 0 dB.................................. 0 clients

SNR 5 dB.................................. 0 clients

SNR 10 dB.................................. 0 clients

SNR 15 dB.................................. 0 clients

SNR 20 dB.................................. 0 clients

SNR 25 dB.................................. 2 clients

SNR 30 dB.................................. 0 clients

SNR 35 dB.................................. 1 clients

SNR 40 dB.................................. 1 clients

SNR 45 dB.................................. 1 clients

Nearby APs

AP 2c:36:f8:0c:18:e0 slot 0.................. -58 dBm on 1 (192.168.1.7)

AP 2c:36:f8:0c:3a:b0 slot 0.................. -93 dBm on 6 (192.168.1.7)

Radar Information

Channel Assignment Information

Current Channel Average Energy............... -78 dBm

Previous Channel Average Energy.............. -62 dBm

Channel Change Count......................... 1

Last Channel Change Time..................... Fri Apr 11 12:00:14 2014

Recommended Best Channel..................... 6

RF Parameter Recommendations

Power Level.................................. 2

RTS/CTS Threshold............................ 2347

Fragmentation Threshold...................... 2346

Antenna Pattern.............................. 0

Persistent Interference Devices

Class Type Channel DC (%%) RSSI (dBm) Last Update Time

------------------------- ------- ------ ---------- ------------------------

All third party trademarks are the property of their respective owners.

(DOCSADCWLC01) >show ap auto-rf 802.11a DOC-HQ-AP16.3

Number Of Slots.................................. 2

AP Name.......................................... DOC-HQ-AP16.3

MAC Address...................................... 4c:4e:35:60:45:96

Slot ID........................................ 1

Radio Type..................................... RADIO_TYPE_80211a

Sub-band Type.................................. All

Noise Information

Noise Profile................................ PASSED

Channel 36................................... -93 dBm

Channel 40................................... -91 dBm

Channel 44................................... -93 dBm

Channel 48................................... -92 dBm

Channel 52................................... -92 dBm

Channel 56................................... -91 dBm

Channel 60................................... -91 dBm

Channel 64................................... -90 dBm

Channel 100.................................. -89 dBm

Channel 104.................................. -90 dBm

Channel 108.................................. -89 dBm

Channel 112.................................. -90 dBm

Channel 116.................................. -86 dBm

Channel 132.................................. -85 dBm

Channel 136.................................. -84 dBm

Channel 140.................................. -88 dBm

Channel 149.................................. -88 dBm

Channel 153.................................. -81 dBm

Channel 157.................................. -87 dBm

Channel 161.................................. -85 dBm

Channel 165.................................. -87 dBm

Interference Information

Interference Profile......................... PASSED

Channel 36................................... -128 dBm @ 0 % busy

Channel 40................................... -128 dBm @ 0 % busy

Channel 44................................... -128 dBm @ 0 % busy

Channel 48................................... -128 dBm @ 0 % busy

Channel 52................................... -128 dBm @ 0 % busy

Channel 56................................... -128 dBm @ 0 % busy

Channel 60................................... -128 dBm @ 0 % busy

Channel 64................................... -128 dBm @ 0 % busy

Channel 100.................................. -128 dBm @ 0 % busy

Channel 104.................................. -128 dBm @ 0 % busy

Channel 108.................................. -128 dBm @ 0 % busy

Channel 112.................................. -128 dBm @ 0 % busy

Channel 116.................................. -128 dBm @ 0 % busy

Channel 132.................................. -128 dBm @ 0 % busy

Channel 136.................................. -128 dBm @ 0 % busy

Channel 140.................................. -128 dBm @ 0 % busy

Channel 149.................................. -128 dBm @ 0 % busy

Channel 153.................................. -128 dBm @ 0 % busy

Channel 157.................................. -128 dBm @ 0 % busy

Channel 161.................................. -128 dBm @ 0 % busy

Channel 165.................................. -128 dBm @ 0 % busy

Rogue Histogram (20/40_ABOVE/40_BELOW)

.............................................

Channel 36................................... 0/ 0/ 0

Channel 40................................... 0/ 0/ 0

Channel 44................................... 0/ 0/ 0

Channel 48................................... 0/ 0/ 0

Channel 52................................... 0/ 0/ 0

Channel 56................................... 0/ 0/ 0

Channel 60................................... 0/ 0/ 0

Channel 64................................... 1/ 0/ 0

Channel 100.................................. 0/ 0/ 0

Channel 104.................................. 0/ 0/ 0

Channel 108.................................. 0/ 0/ 0

Channel 112.................................. 0/ 0/ 0

Channel 116.................................. 0/ 0/ 0

Channel 132.................................. 0/ 0/ 0

Channel 136.................................. 0/ 0/ 0

Channel 140.................................. 0/ 0/ 0

Channel 149.................................. 1/ 0/ 0

Channel 153.................................. 0/ 0/ 0

Channel 157.................................. 0/ 0/ 0

Channel 161.................................. 0/ 0/ 0

Channel 165.................................. 0/ 0/ 0

Load Information

Load Profile................................. PASSED

Receive Utilization.......................... 0 %

Transmit Utilization......................... 2 %

Channel Utilization.......................... 5 %

Attached Clients............................. 2 clients

Coverage Information

Coverage Profile............................. PASSED

Failed Clients............................... 0 clients

Client Signal Strengths

RSSI -100 dbm................................ 0 clients

RSSI -92 dbm................................ 0 clients

RSSI -84 dbm................................ 0 clients

RSSI -76 dbm................................ 1 clients

RSSI -68 dbm................................ 1 clients

RSSI -60 dbm................................ 0 clients

RSSI -52 dbm................................ 0 clients

Client Signal To Noise Ratios

SNR 0 dB.................................. 0 clients

SNR 5 dB.................................. 0 clients

SNR 10 dB.................................. 0 clients

SNR 15 dB.................................. 0 clients

SNR 20 dB.................................. 1 clients

SNR 25 dB.................................. 1 clients

SNR 30 dB.................................. 0 clients

SNR 35 dB.................................. 0 clients

SNR 40 dB.................................. 0 clients

SNR 45 dB.................................. 0 clients

Nearby APs

AP 2c:36:f8:0c:18:e0 slot 1.................. -76 dBm on 36 (192.168.1.7)

AP 2c:36:f8:0c:67:40 slot 1.................. -80 dBm on 52 (192.168.1.7)

Radar Information

Channel Assignment Information

Current Channel Average Energy............... unknown

Previous Channel Average Energy.............. unknown

Channel Change Count......................... 0

Last Channel Change Time..................... Fri Apr 11 07:53:44 2014

Recommended Best Channel..................... 64

RF Parameter Recommendations

Power Level.................................. 1

RTS/CTS Threshold............................ 2347

Fragmentation Threshold...................... 2346

Antenna Pattern.............................. 0

topic RRM Neighbor Message/RRM Neighbor Message dBm threshold/Recommended TPC settings in Wireless

RRM Neighbor Message/RRM Neighbor Message dBm threshold/Recommended TPC settings

Re: RRM Neighbor Message/RRM Neighbor Message dBm threshold/Recommended TPC settings